Update app.py

app.py

@@ -66,6 +66,7 @@ data["city"] = [random.choice(cities) for _ in range(num_records)]
 table = pd.DataFrame(data)
 '''
 #table = pd.read_csv(csv_file.name, delimiter=",")
+#table.fillna(0, inplace=True)
 #table = table.astype(str)
 
 data = {